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2002 | 101 | 4 | 505-523
Article title

Study of the Mott Transition in the Three-Dimensional Hubbard Model

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Abstracts
EN
The Mott-Hubbard transition in the three-dimensional Hubbard model is studied by means of the composite operator method. Analytical and numerical calculations show the existence of a critical value U_c of the Coulomb interaction which separates paramagnetic insulating and metallic phases. In the composite operator method the ratio U_c/W, where W is the band width, has the same value as in the two-dimensional case. The ground state of the Mott insulator is characterized by a local antiferromagnetic order where the electrons keep some mobility, but this latter must be compatible with the local ordering. By analyzing the intersite hopping it is possible to establish that some correlation functions behave as order parameters in the insulating phase.
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Publisher

Year
Volume
101
Issue
4
Pages
505-523
Physical description
Dates
published
2002-04
received
2001-04-06
(unknown)
2001-12-22
Contributors
author
  • Dipartimento di Fisica "E.R. Caianiello" - Unità INFM di Salerno, Università degli Studi di Salerno, 84081 Baronissi (SA), Italy
author
  • Dipartimento di Fisica "E.R. Caianiello" - Unità INFM di Salerno, Università degli Studi di Salerno, 84081 Baronissi (SA), Italy
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv101n401kz
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